Shifting device.



C. W. PARKER.

SHIFTING DEVICE.

APPLlcATloN FILED senza. 191s.

Patented Jan. 2,1917.

y SHEETS-SHEET l.

Mlm\\\ c. w. PARKER.

SHIFTING QEVICE. j APPLICATIQN FILEDFSEPT.23. 1916.

y www C. W. PARKER.

SHIFTING DEViCE.

APPucATmN. msu 559123. 1916,.

Patented J an. 2,l 1917.

C. W. PARKFR.

SHI-FTING DEVICE.

APPLxcmmL mso SEPT. 23, 191|6.

Patented Jan. 2,1917.

4 SHEETS-SHEET 4.

OLARK WQPARKEE 'or nnmiioi'r, MICHIGAN, AssIGNOR To CADILLAC-MOTOR OAR'1t/'alt mov/thi?) may comer/L.:

:Be it known that 1*, ACnuiii` lV.y PAiiuiiaii,y ,a citizen of theUnited States, and resident of Detroit, ll'aynefclountvvg State ol-Michigan, having' invented certain iiewf and'useful. linproveinents inShifting' Devices, ot which w thextollo'wiiig vis a specification. Thisinvention relates tosliittingdevices, and more,particularly yto. suchdevices espef eially adapted t'or use'in speed-change transmission`mechanisms asl applied .tonnotor vehicles.v f l v salient obj ect of,this invention Jis lto provide. transmission i,niecliaiiism,VA havingmore than two' sliiftable change-'speed yde- \'ices,1with means forshifting one ot' said devices w.ith a sliit't ,nioveinen'tr-ot' any of'tlie other devices. A, .f

'Another object of this iiiventioiif-is to provide, ina change speedvt,rainsuiissioii mechanism, a novel cani interconnectingmechanism,'between shiftable clian'gesspeed devices7 whereby.apair ofsaid devices may be selected and simultaneously shifted.

Another; Object of thisginvention. is .to y provideiiovel means forselecting' and shift-,-

ing, various change-'Speeddevices in a transmission mechanism. Y

Theseaiid kother objects will app iai, from the,following` descriptiontaken in connec tion `witli the illustrative drawings which forni a4part of this specification, and `in ,wliichz f Figure. 1 is a;longitudinal vert-ical sectionalvirjiew oi" a, preferred lorni oit'transmission mechanism equipped with insluiting device'- embodying? ymynivel tion, substantially zontal sectional:view, w it-li y portionsybroken away.. substantially ou the line oi Fig;

1 Fig. Sis a -horizontal sectional view substantiallyonv lie line 31W?),illfig. 1; Fig. 41 `is atigansv rse sectional view substantially on thelines'f-t of Fig verse sectional view sub ing forli carrier Figsg Vand Sare .detail views ot. clutch nieinliersplfig,Slis alouguudinal.sectional r:vicar ',tliroiiglr the. cani shaft substantially on the line-Q-Qlrot Fig. elf; and

Fig. 10 )is a. .longitudinal sectional View thi-oubli the cam shaftsubstantially on thel line 10--10 of Fig. 4.

Referring to the drawings, 10 represents COMPANY, OF DETROIT, MicHIGAN,A CORPORATION OF MICHIGAN. v

iii

Specificationiof Letters Patent.

FZ: Fie. 5 is aft-raus@ antiallr on the line 5--5 ol?, Fig. 2; Fig. (iill'ilstigatesan asistanbly, with portions broken away. o'la sliift- 4 Yy 'i surname DEVICE,-

Patented Jau. 2,1917,

'Appncatinaiiied september es, 1916. vsmal1\r0.-" 121 .734.

a' transi'iiission casing,I provided withaend walls 1l and 12, and upperand lower -walls 13 and 11., Arranged in the casing 10, in a mannerwhich will be described more fully hereinafter, arealined shafts 15 and1G and a? parallel countershaft "1T, The .driving shaft 15 is adapted tObenconiiected toa prime iiioveir-(not sliown)-,tlirougn the usual clutchmechanism which may be, ar-

, ranged at .the forward endet' the driving shaft as at 2st.' Arrangedin a recess formed' iii the rear end of the driving yshaft 15 isananti-friction vbearinbrv in, which 'Y may be mounted the forwardcontracted end 2T of thedriven shaft 1G'. The rear end of this shafthas. fitted thereon an anti-friction bearing,- 28 which is'mounted inthe detach'- able end wall 12 Of tlie'easing and secured in positionbymeans of the cap Q9 and bolts 30. rThe countersliaft 17 is'arrangedbelow the alined shaftsiii suitable bearings 3l and 3Q. The bearing3111's arranged in a cap 3,3 suit ably secured to the :trent end wall11; and

rear end w'all l2. Another cap member 31 is' suitably secured' to therea-r end wall 12 over the rear end of the countersliaft.

1t will be noted that,"a'djustably'mounted in the cap members 33 and3&1, respectively,

are buttons for resisting-*any end thrust of the-couiitersliaft Thecountershaft 17 may have, suitably'sec'ured thereto, as 'by lkeys 36,-'apluralityof gears, 38, 39,40, and

41, respectively, o1 different diaineteie.v

The aliiied Shafts 15 and 16 have, loosely l arranged thereon, a.plurality of gears, 42,

43, :indd-1, adapted to constantly mesh withv ,the gears 38, 39,and 10on the countersliaft. K v

Another` gear' 45 may be loosely mountedv on the driven shaft 1G' andadapted to c0n-v neet with the gear 4101i the counte'i'sliaft,

through an idler gear suitably arraiiged .in the casing.

the bearing 32 is suitably mounted iii the,

clutch member 53. This clutch member, while secured against rotation bysplines 51 on the shaft 16, may be shifted axially thereon. This clutchmember is provided with notches 55 which are adapted to be connectedwith either of the complementary clutch members 51 and 52 by a forwardor rearward movement of the clutch member 53, thereby connecting eitherof these gears vith the driven shaft 16.

The rear end of the driving shaft 15 and the forward end of the gear 4B0n the driven shaft 16 are provided witli--backed-off or beveled-facedclutch teeth 56 and 57, respectively. Arranged on the shaft 16, in--termediate the teeth 56 and 57, is another double clutch member 58which is secured to the shaft 16 in the Same manner as the clutch member53 is secured thereto. The clutch member 58 is also formed with notches59 which are adapted to be connected with either of the complementaryclutch members 56 and 57 by a forward -or rearward movement,respectively, of the clutch member.

Suitably mounted in the opposite end walls 11 and 12 of the casing, andfixed against movement therein, are a pair of supporting shafts 60 and61. A pair of carriers 62 and 63, having bosses 64 are slidably arrangedon the shaft 61. A similar carrier 65 is slidably mountedon the shaft60. Shifting forks 66, having bifurcated arms 67, are pivotally mountedas at 68 on each of the carriers, 62, 63, and 65, respectively. Thebifnrcated arms of the shifting fork which is mounted on the carrier 62are adapted to be arranged in the collar 69 of the clutch member 47 forshifting same. The arms 67 of the fork 66 which is mounted on thecarrier 68 are adapted to be similarl arranged in the collar 70 of thedouble clutch member 53, for a similar purpose. rl`he arms 67 o1 theshifting fork 66 which is mounted on the calrier 65 are adapted to bearranged in the collar 71 of the double clutch member 58. Each of the.carriers 63 and 65 is provided with :mother boss 72.

bolt 73. having a pair of plates 74 and 75 held apart by a spring 76. isadapted to have one of its ends mounted in thel boss 72 and secured inposition by another plate 77 which is threaded thereon as at 78.

llaeh ot' the shifting forks 66 on the Carriers 6? and 65 is provided atits upper end with another pair of arms 79 which are adapted to extendbetween the plates 75 and 77, which permit each shifting fork to swingabout its pivot 68 a limited distance forwardly and rearwm'dly. rl`heforks 66 on the carriers 621 and 65 have. also secured Ihereon. as byrivets 80. a rain plaie 8l. the inner face H2 of which is adapted loroiipel'- :ile with depressions or grooves Si; 11n-umd in Ihe shafts 60and 6l, respectively, for a .formed purpose which will be described morefully iereinafter.

The carrier 62 is )rovided with a boss 81 in which maybe tlreaded astud-bolt 85. A pair of plates 86 and 87, which are adapted to be heldapart by a spring 88, may then be arranged on the bolt.

The fork 66 which is mounted on the earrier 62, it will be noted, isalso provided with another pair of bifurcated arms 89 adapted to bearranged between the plate S6 on the bolt 85 and another plate 90 whichmay be threaded as at 91 on the bolt.

Each of the carriers 63 and 65 is provided with integralupwardlyextending arms92 and 93, respectively, having slotted bosses 91 in whichmay be arranged bolts 95. Threaded on these arms 92 and 93 are shiftingheads 97 and 98. These heads arc provided with slotted or notchedportions 99 and 100. Each of the heads and 98 is also provided with acylindrical portion or guide-rod 101 and 102, respectively, mounted 1n aloekcasing 102 secured to a pei estal support 103 as by bolts 104. Thecylindrical portions 101 and 102 of the heads 97 and 98 are providedwith Islots 105 in which a y spring-pressed plunger 106 for a yieldinglock may rest, and slots 107 for'a positive lock 108 in which a ballmember 109 forming an interlock may rest.

The lock casinr 102 is provided in its' upper portion wit 1 alongitudinally extending groove 110 for a. purpose which will bedescribed more fully hereinafter. 'lhe pedestal support and covermember103, which is adapted to cover the opening 111 in the upper wall14 of the casing 10, is adapted to be secured in position as by bolts112. A cam shaft 113 may be slidably arranged in oppositely disposedbearing members 114, mounted in bosses 115 in the cover member 103.r1`-heram shaft 113 may have thereon or secured-thereto a socket portion116 and a downwardly extending,r shifting and selecting finger 116. Alsosecured to the shaft 113 or formed integral therewith are calns 117 and118 having a plurality of sets of eam contours 119-119 and 1Z0-120',res|wetive|y. A cam follower 121. havingy a main arm 122 and transversearms 1221, may be pvotally mounted as at 121 in the cover member 103.The opposite ends 125 of the transverse arms 1251 o1' the cam follower121 may be actuated by the.

eanis 117 and 118 as will be described more fully hereinafter. The mainarm 122 of the cam follower 121 is bi fureated at 126 to embraee theupwardly extending arm 127 of the carrier 62 for aeluating the saule.

Sleeved on the ealn shaft Ilfi is a locking member` 128, having adepeudlngr lug |29 slidably guided by grmive 110 formed iu easing; |02'.'l'he locking member |28 is provided with a lateral groove 1110, and ismaintained againstv axial move'lnent on the shaft 113 between the ve`a1n 1l7 y and the pin 128.'.

beL onneeted throughy 'linkage 134 with the actuating y "tWeen-'thedriving .shaft 15 and the motor, 1o (not shown). The other armv 133 is'pro- Avided .with a shoe 135 which isl adapted' to be located inthegroove 130 of the locking member 128 When .the clutch member 24 islin '.'e11gagfe i'y j position,l vthus preyenting an axial shiftingmovement ofthe earn shaft ing `leii`er136 comprises a ball niernber137AASpherical-surface,143:.aind a nut-'144 'threaded in position in the`pedestal member 103 serves to .hold the lever in' tions.

t1on errangement, and disposition of parte', 1t is -believedthat itsoperation will'be unders'tood as'folloWs': Assuming all; the' i ga to"be in v positions illustrated in lthel r l lgs, the clutch betweenthemotor (noty 'd the vdriving shaft/will be disengaged; `The lower endvoliiingwthe'jcam shaft 113 -ina clockwise direetiolndookingforwardlythereof, thereb owing the-selectingv andshifting finger oltilie leftLinto theslotted portion 100 shifting` headQS.

leue hns tilted the lowei enfd-niay moveglgsforwardly, 4also slidingfthe carrier bear 44 ar` e for engagement ollithiineniber 53, theresistanee encountered het) en shifting fork 6G audits earlier 63 `lanse'a Compression of thefspring ST6' 'sWingi 11,. ;y -nioienient of thefork t'GS. lH0we v'er, when o oni-litions are :l""f iillnnfshing ofthejteoth 51 expansion :of the sjnfing 76 will iiftingifforlivtoreturnto a. sulialllfyertieal 13S o' thelerei' i lteil to the yright vting: the hrw-speed folntehingdeuiee, 'ontbi'ir 11de-119 is presented tonot in absolute aline'nient position,l with the 'cam the rear end 125 ofthe cam .follower 'will mechanismfor the 'clutch 24 be- @118, andtherear end of, the cani follower neotedtherewith, 'thus connecting the.drivvspeed', thev main clutch will be nal position.

Q It rwill be noted f shifted forward vthe rear portion of the face i82'01" the (earn 8,1 secured to ,the upper part of the shiftingfork`with the' teeth in ther ing.V offthe selecting 'linger 116 intotheslotted :portion 99 of on until the teeth 57, are ion: 1W hen the hlwer It will ,be

the/dani follower 121. In

so turned,

follower 121.-

abutaigainst the highest point of theeam vcontour 119, andr'theforward-mul 125 of i the canrfollower will be located in the .low-

isholft 131 lhaving arms 132 and 133, re- 5 speetively,`jmay vbe mountediny the coverr member ,103` The armr132 is adapted'to est part ofthecamr contour 119. l`herif -re, as rthe ouin shaft 113, with itsactuating finger 1(3, `isl shifted forwardly, the yforward en oloftheealn follower will be lnqyed A pivot 124 and a forward movernentofthe lcarrier G2 and the elutoh ineniber 47 oon- S() ing shaft 15 uf'iththegear 42 loosely mounted thereon.v lV ith this 'arrangement ofClutches, a ydrive is given from the shaft 15 through thev gear 42, 3S,40, and '44 to Y*the driven shaft-16. AftenV the parts arethus shifted,main elutehy connecting the niotor with the (jlrivingl shaft may vbeengaged.v `Ii it is now desired togo into intermediate vdise-inguged andthe lower end 138 of the shifting" lever 9o may then ybe movedrearwardly to its origithat asthe earrier '(33 will deseeml into the.r

depression,origrooie 83v formed in the sta.-v l .tionary shaft (S1 onwhich therarrier-GQ- kis n iounted.l Therefore, when the carrier 63 'is'shifted rearwardly for disengaginey the clutch member 53 from the teeth5l the rear end of the kCain faee82 is caused` to move "outwardly, i fit vhappens to be tilted, until it is iniasubstantially verticalposition, thus insuring ,the positive w1thdrawal of the elutrhfromtheengaging pos1tionwh1le per;l

inittingbf a yielding engagementofI the clutch and its complementaryparts. fcourse it will be `understood,that as the.4 ',elut'ehingelement-53 is brought back tornen-- 63,i .t s shiftingfork 66',andithedonbleclutch i meinberfofto Which/itis connected, in thef iireetien. Iftheteeth- 5il on the ,low-

trai the clutching'member 47 is also brought buehr into neutral by anaction of the. eamsm 117A and 1.18` whieh is `the reverso of thatdescribed` lhe lower end .138 of the lever v niaynoube tilted to theleft, causing an oscillation of the cani shaft 113 and a tiltto theright the shifting head 9T. The cani shaft 113 may then be,shiftedrearwardly,` causingthe carrier 65, itss'hiftiing` fork 66, andvitseonneeted eluteh member 58 to nio-Vein the same direction Struck byvthe teeth 59 in the eluteh member. v

understood that. as y the finger 11G is roekedv tothe-right theeani'eontonr 120--120 Vis presented for .actuating the cani Wtlrsueh Varocking movenient, before the cam shaft 113 is shifted rearwardly therear end of the cam fol- 130 lower will bel adjacent the point where theouter straight surface of the cani 117 meets the. receding porlioii olthe eam, and the forward end 1:25 of the eain follower will he adjaeeiita point where the straight Surfare of the eaui 11S meets the risingpoi'- tion of the eani. rTherefore, as cam Shaft 112 is moved rearwardlytlieeanis 117 and 11S will eaiise the forwaid end 125 of the eamfollower io ride outwardly on the cani contour 120 and the rearwai'd end125 to ride inwardly on the eain contour 1:20. This will eause a forwardrocking movement of the main arm 122 off the eain follower, to shift thecarrier U2 .-.iid the clutch member -l7 to again engage with the gear42.

1f, as the eliiteli element 5a is brought against the complementaryteeth 57 on the gear 42E. the shaft 14' on whieh the element is mountedis revolving at a greater Speed than the gear 4Q, there will be noengagement of the teeth 5T with the teeth 59 until the shaft ltdecreases in speed to or below' that of the gear 43, the reason heiligthat the beveled teeth 57 are so backed-ntf that they will slide by'theteeth 59 in the clutch niember in one, direi-tion. This, of coin-se,will canse, a eoinpressioii of the spring 76 on the earrier (S5. withthe tilting of its shifting fork (313. ()f course, wheirthe parts are inproper relation for ehiteliing engagement, the expanding action of thespring with the shifting lever in a predetermined position will eause ayielding engagement of the, eluteh 5S aud the gear 43. It is alsolinderstood that as the carrier (32 shifts the clutch member 47 ayielding engagement is permitted and a positive disengagement is alsoprovided. The shifting earrier is provided with means similar to'that onthe carrier (33, whieh gives a positive disengagement of the eliitehiiigmember in either direetion. With the eluteli member 5S in drivingroniieetion with the gear 43, the drivel through the transmission isfrom the driving shaft 15 through the gears 42, 38, 3%), and 43 to thedriven shaft 1G.

lf it is now desired to directly connect the driving anddriven shafts,the cam shaft will be moved forwardly, bringing the clutch elements 5Sand 47 into neutral position, and willi the lower end 138 of theShifting lever still tilted toward the. left theinain eliiteli will bedisengaged and the shifting lever moved forwardly` still carrying theearrier ($5 and the eluteliingelement 58 in the saine direetion. .If theeliiteli teeth 56 on the driving shaft are not in proper relation to theteeth 59 oa the clutch 58, there will be a compression ol' the spring 76until the parte are in proper relation for engagenient` when tliespriiigwill CallSe the Parts lo rome together; (lil the other hand, if thedriven shaft and its eliileli member 58 are going at a greater speedthan the driving i shaft 15 and its clutch member 56, the fornier shaftwill overrun the latter shaft until the speeds are equal or until thedriving shaft is going at a greater speed than the driven shaft, whenthere will be n yielding engagement connecting the driving and di'iveiishafts directly.

It will he understood that when the cam shaft lltl is moved forwardlyfor directly driving the driven shaft, the cam' follower 121 will not berocked from its neutral p0- sition on aeeoiint of the fact that theforward and rear ends thereof will ride on the parallel faees ofthe eaincontour 12th-120';

lt will he. noted that with a direct drive between the driving anddriven shafts there is no drivingconnection between either the drivingor driven shaft and the, countelr-A shaft; therefore the coiintershiiftis idleon, direct drive.

After shifting the eiim shaft 113 rear-lA i wardly, disengaging thedirect driving connection. a reverse drive may be obtained by tiltingthe lower end 138 of the shifting lever to the. right` moving theselecting finger 1li; to the left. as for low-speed connection, amlmoving the carrier (33 and its coni nei-led eluteh member 53 rearwardly,thus connecting the teeth on the gear 45 with the clutch member 53. 0fcourse, if the ehiteh parts are, not in ideal relation for l drivingconneetion there will be yielding or overruiining engagement asdescribed in 00niieetion with the engagement of the clutch member 53with the. teeth 51. Of collr it will be understood that the cam contour11n-119 will cause an engagement of thev eluteh memberI 47 with the gent4 2. rW'ith. the reverse drive shift, the connection will be from thedriving shaft r15 through the gears 42, 38, 41, 46 and 45. y

lt will he understood that the de ding lug 129 formed on the lockingmein r 128 will slide forwardly and rearwardly in the groove formed inthe lock easing 102', and is' adapted to prevent rotation of the lockingmember 128, thereby maintaining its groove in proper interlockinrelation with the shoe on` the shi. 181, thereby preventing a shiftingof the com shaft 113 when the main clutch il`in ell-l gnged ition. l i

It will be noted that-if, while' the M 16 is revolving for forwardspeed, the double clutch member 53 is thrown rearwardly 0oward the gear45 for connecti this goor to the shaft 16 for reverse, un the gell' 45is going in the opposite direction to the clutch member 53, the shiftingmechnnilm for the 'elateh member 53,k including its spring, willeoperatc with the bockodwlf teeth 52 on the gear 45 to form anoverruuning eluteh mechanism until tho p irh are in proper relation forn rever driving* connection also, if the double clutch member lllbinat'ion with a 'pa 15` -shifting lever,

53 is thrown for a forward speed, under bination with aplurality ofshiftable clutch members, arms connectedfthereto, 'a rotatableandaxially shiftable shaftand a finger larranged on said shaft'and adaptedto be connected with either` of a pair of said arms by a rotationalmovement, ofthc sliatt`,' "of' agcam arranged on'said.e shaft, meansconnected with.. another of -said arnisand `,adapted to(v be actuated bylsaid 'cambyl'an A1.1111 a transmission mechanism, the c omir ofkshifting'arms,a fork connected W-ithy each of said arms, and' a of meansYconnecting said shifting lever with, said arms whereby said lever maybe connectedy withL either of said arms by a lateralmoveinent-andwillshift either of rthem by a forward and rearward movement of saidlever, athirdv fork 'havingjany arm arranged thereonpsaid means havingaY cam arranged thereon, and a follower adapted tolle actuatedhy saidcam connected with said latter-mentioned arm, as and for the purpose setforth.

, 2. In a transmission mechanism, the` combination with a 'pair ofshifting forks pro-v vided ,with arms, a rotatable and axiallyvshiftable shaft,r and a finger on said shaftv adapted to be connectedwith either of said arms by a rotationalmovement of the shaft, of cammeans formed on said shaft, a cam follower adapted to be operated by anaxial movement, another shifting fork provided with an arm connectedwith said' follower, and means for imparting a rotational and axialmovement to said shaft.

In a transmission mechanism, the coinbination with a pair of shiftingforksprovided with arms, a rotatable and axially shiftable shaft, and afinger on said shaft adapted to be connected with either'of said arms bya rotational movement off the shaft, of a cam arranged on said shaft,provided with a plurality of operating faces, and a can".lfollowei'adaptcd to be operated by'nne of said faces by one rotationaland axial movement of said shaft, to be operated by another of said cainfaces by another retatioiial and axial n'ioveinent of saiilshaft, andmeans connectingy said follower with oney of said forks.

4. in a transmission mechanism, the coinbinalion with a plurality ofshiftable clutch members. arms connected thereto, a rotatable andaxially shii'iable shaft, and a linger arranged on said shaft andadapted to be con- -iiected `with either off a pair of` said arms by arotational movement of the shaft, of a cani arranged on said shaft, andmeans cnnected with :mother of said arms and adapted to be actuated bysaid cam by an axial movement of said shaft.

5. ln a transmission mechanism, the comaxial viiiovement -of said shaft,aiidai'ieans for locking said shaftagainst axial movement."

v6. 'Tn a transmission mechanism, the combinationir of a rotatable andaxially shiftable 'shaftjhavi-'n'g a cani arrangedthereon, ksaid canihaving a plurality of'o'i' ei'atiiig yf`aces,la' cainrfoilo'wei, saidfaces. heilig pi'eseii'tedfto said' follower by a rotationalrinoveii'i'ent of 'the cam, saidfollo'wer bein'g adaptedy tobe '-ineans.connectingsaid follower a-ndv one of shifted', anda finger onsa '.to be`vselecgztively Vsaid arms and to shift the saine Aby an axialactiiatei'l by an axial movement lof said' shaft,

said forks iinda'pair'of` arms adapted tofhe` Y idk shaft adaptedconnected with either l of 'movement of the shaft.

7. In a transmission mechanism, the coinbination of a rotatable andaxially shiftable shaft having a cani arranged thereon, said cam havinga plurality of operating faces, a cam follower, each of said faces beingpresented to said follower by a rotational movement of the cam, saidfollowerbeing adapted to be actuated by an axial movement of saidYshaft, a pair of ai'ins'adapted to be shifted, a finger on said shaftadapted to be selectively connected with either of said arms and toshift the saine by an axial moveiuent of the shaft, a plurality ofshiftable clutch eleniei'its, and means connecting said elements withsaid arms and said follower, respectively.

Vao

8. In a transmission mechanism, the comy bination ofsa rotatable andaxially shiftable shaft having a cam arranged thereon, said cam having aplurality of operating faces, a cani follower, cach of said faces beingpresented to said follower by a rotational movement ofthe cam, saidfollower being adapted to be actuated by an axialmovef nient of saidshaft, a pair of arms adapted movement of the shaft, a plurality ofshiftto be shifted, a finger on said shaft adapted to be selectivelyconnected with either of said arms, and to shift the same by an axialment of the shaft and to be actuated by said faces by an axial movementof the same, a

linger arranged on` said shaft and adapted i to be connected with any ofa plurality of arms by rotational movement of the shaft and to shiftsaid arms by an axial movement thereof, another arm, and shiftableclutch elements adapted to be connected with said arms and follower,respectively.

10. 1n a transmission mechanism, the combination with a rotatable andaxially shiftable shaft having a cam arranged thereon, said cam having aplurality of operating faces, a pivotally mounted cam follower adaptedto be brought into operative relation with either of said faces by arotational movement of the shaft and to be actuated by said faces by anaxial movement of the same, a finger arranged on said shaft and adaptedto be connected with any of a plurality of arms by ltational movement ofthe shaft and to slfift said arms by an axial movement thereof, anotherarm, and shiftable clutch elelnents adapted to be yielumgry connectedwith said arms and follower, respectively;

11. 1n a transmission mechanism, the combination with a rotatable andaxially shiftable shaft having a cam arranged thereon, said cam having aplurality of operating faces, a pivotally mounted cam follower 'adaptedto be brought into operative rela- CLARK W. PARKER.

